Stock-holding attachment for milling-machines.



W. G. ADAMS.

STOCK HOLDING ATTACHMENT FOR MILLING MACHINES.

APPLICATION FILED JAN. 28, 1914.

Patented Nov. 3, 1914.

2 SHEBTS-SHEET 1.

Miizasses W. O. ADAMS.

STOCK HOLDING ATTACHMENT FOR MILLING MACHINES.

APPLIOATION TILED JAN.28, 1914. 1,1 1 6,342.

Patented Nov. 3, 1914.

2 SHEETS-SHEET 2.

lllllllllll F 5 r "is 3 M iffy WILLIAM C. ADAMS, OFHARTFDRD, CONNECTICUT.

STOCK-HOLDING ATTACHMENT. FOR MIIiLING-MACHINES.

Specification of Letters Patent.

Patented Nov. 3, 1914..

Application filed January 28, 1914. Serial No. 814,868.

. To all-whom it may concern Be it known that I, WILLIAM C. ADAMS, a. citizen of the United States, residing at Hartford, in the county of Hartford and State of. Connecticut, have invented a new and. useful Improvement in Stock-Hold ng Attachments for Millin -Machines, of WlllCll the following is a speci cation.

This invention relates to a mechanism which is designed to be attached to the bed of a milling machine for holding and feeding the stock to be operated on, and although the attachment may be used with many of the. common forms of milling machines it is particularly adapted for use with hand milling machines for holding andfeeding circular pieces of stock on the ends of which teeth are to be cut for producin ositive clutch members, bevel gears, an t e like machine elements.

The object ofthe invention is to provide an attachment which can be built at a relatively low costand readily attached to any of the common forms of milling machines, and which can be quickly adjusted by anyone in such manner that the desired work may be rapidly and accurately performed by comparatively unskilled labor.

The invention is illustrated in the accompanying drawings as embodied in an attachment which is designed for holding positive clutch blanks on the ends of which ten teeth are to be cut.

Figure 1 shows a plan of the attachment holding a ten-tooth clutch member. Fig. 2 shows a front elevation of the same. Fig. 3 shows a central vertical longitudinal section. Fig. 4 shows an end elevation.

The attachment has a base 1 which is designed to be fastened in any suitable manner: to the bed of the milling machine with which it is to be used. On the top of the base and movable toward the front and the back with a portion extending into a suitable guide-way is a slide 2. Binders, consisting of screws 3 that extend through the slide and have heads {1: located in undercut slots 5 in the upper face of the base, and nuts 6 with handles 7 are provided for clamping the slide in any desired position in the path of its movement back and forth on the base. Attached to the upper face of the base back ofthe slide is a block- 8 carryinga screw 9 with a binding nut 10. This screw formsan adjustable stop for: determining-the end of the backward movement of the slide. In the block 11 attached to the top of the base in front of the slide is a screw 12 which forms an adjustable stop for determining the end of the forward movement of the slide. On the screw 12 is a graduated collar 13 which, 1n cooperation with the finger 14, mounted on the end of a bar 15 that moves in and out of the base, shows the amount of rotation and consequently indicates the feed in and out of the screw. This graduated collar is.

attached to a thumb nut 16 by means of which it may be set, and it is clamped on the screw by the thumb nut 17. The graduations on this collar are preferably made so as to indicate each thousandth of an inch of movement in or out of the screw. By this means the position of the inner end of the screw can be very accurately determined for the urpose of exactly fixing the back and fort movement of the slide between the two stop screws.

At the center of the slide is an upwardly projecting tubular arbor 18. This arbor is free to rotate but is held from longitudinal movement in the slide which carries it. Turning freely on this arbor is a swivel plate 19. Binding screws 20 with handles 21 that extend through slots in the swivel plate into the slide are provided for clampmg the swivel plate to the slide when it is so desired.

Keyed to the arbor above the swivel plate is the index ring 22. This index ring is provided with notches equal in number to the number of teeth to be cut on the stock which the attachment is to hold. The index ring is easily removable, bein held in position by a nut 23, so that an in ex ring which has a number of notches equal to the number of teeth to be cut on the stock may be quickly applied to the arbor.

Pivoted to the swivel plate is a lever 24 with a tooth 25 that is adapted to engage the notches in the index ring. A spring 26 in the spring box 27 thrusts the lever so that the tooth will-engage the notches in the index ring, a handle 28 being provided at the front end of the lever for turning the lever and withdrawing its tooth from the index notches. By the engagement of the tooth on the lever that is fastened to the swivel late with a notch in the index ring,

thespindle is connected with the swivel plate so that it will be turned therewith. When the lever is drawn back so as to disengage its tooth from an index notch, the

. swivel plate.

spindle may beturned independently of the A receptacle 29 is desirably fastenedpn the upper end of the-spindle for catching lubricating oil and the chips wlnch result from the work. The interior of the tubular receive and hold the tapering shank 30' of spindle is desirably taperingso that it will Extending from the side of the swivel plate between these stops is a handle 37. By means of this handle the swivel plate may be turned back and forth the amount of movement, being limited by the engagement of the handle with the stops. On the other side the edge of the swivel plate is graduated in degrees for convenience in determining the amount of oscillation of the swivel plate. Pivoted on the slide is a plate. 38 with an index finger 39, that is movable back and forth so as to cotiperate with the graduations of the scale 42 on the edge of the swivel plate. A handled nut 40 is arranged on the pivot screw Al for this plate in order that it may be clamped in the position to which it is set.

In setting up the attachment so that a particular piece of work may be accomplished, an index ring having a number of notches equal to the number of teeth to be cut on the stock is placed on the arbor. The slide is pushed toward the back against its back stop and the handle of the swivel plate is pushed back until it engages its back stop. The backstops are adjustable but are rarely moved except in extreme cases. The front micrometer slide stop is then loosened and turned up against the front of the slide and the graduated collar it carries set at zero and bound. The saddle of the machine carrying the cutter is set so that the back edge of the cutter is on a line with the center of the stock to be cut. The index finger on the small slide carried by the main slide is set until its zero line coincides with the zero of the graduations on the edge of the swivel plate and then bound. The micrometer slide screw which forms the front stop is then turned out a number of thousandths of an inch equal to the width of the cutter to be used and then bound. The slide is then pulled forward into contact with this front screw stop and clamped. The swivel plate handle is then pulled toward the front until the index on its edge registers with the index finger, the number of degrees which the swivel plate should be turned to give the proper pitch to the teeth to be cut. The

flat of course the teeth are cut flat.

ia aeaa rear position. After each cut is made the lever is forced to one side and the stock is turned one notch of the index ring until all of the teeth have been cut on one side.

After all the teeth have been out on one side, the slide is loosened and moved forward and the swivel is loosened and its handle turned to the front and the parts are again clam ed. Then as the stock is indexed around al of the teeth will be cut on the other side.

This attachment is easy to adjust and when adjusted it can be used by anyone so as to index the stock and put it in position to be accurately out. Any desired number of teeth, having any required pitch, may be cut on stock held by this attachment. This attachment eliminates the complicated indexing mechanisms used with the common gear cutting machines. When the bedif is I it is desired to cut the teeth on an angle, such as for cutting bevel-gears, the bed is simply tipped up at one end or the other so that the cuts will be on an incline. Clutch members or gears with any desired number of teeth having the required pitch may be accurately cut by this attachment.

The invention claimed is:

1.. A stock holder having a base, a slide movable back and forth on the base, an arbor rotatably supported by the slide, a

plate swiveled on the arbor, an index ring" attached to the arbor, and means for conmeeting the index ring with the swivel plate so that the movement of the swivel plate will be communicated to the arbor.

2. A stock holder having a base, a slide movable back and forth on the base, means for clamping the slide in any desired position, an arbor rotatably supported by the slide, a plate swiveled on the arbor, an index ring attached to the arbor, and means for connecting the index ring with the swivel plate so that the movement of the swivel plate will be communicated to the arbor.

3. A stock holder having a base, a Slide movable back and forth on the base, stops for determiningthe movement of the slide, an arbor rotatably supported by the slide, a

plate swiveled on the arbor, an index ring attached to the arbor, and means for connecting the index ring with the swivel plate so that the movement of the swivel plate will be communicated to the arbor.

4;. A stock holder having a base, a slide -movable back and forth on the base, adjustable stops for determining the movement of the slide, means for indicating the amount of adjustment of one of the stops, an arbor rotatably supported by the slide, a plate swiveled on the arbor, an index ring attached to the arbor, and means for connecting the index ring with the swivel plate so that the movement of the swivel plate will be communicated to the arbor.

5. A stock holder having a base, a slide movable back and forth on the base, a tubular arbor supported by the slide and having a rotary but no longitudinal movement thereon, a plate swiveled on the arbor, an index ring attached to the arbor, and means for connecting the index ring with the swivel plate so that the movement of the swivel plate will be communicated to the arbor.

6. A stock holder having a base, a slide movable back and forth on the base, an arbor rotatably supported by the slide, a plate swiveled on said arbor, means for clamping the swivel plate to the slide, an index ring attached to the arbor, and means for connecting the index ring with the swivel plate so that the movement of the swivel plate will be communicated to the arbor.

7. A stock holder having a base, a slide movable back and forth on the base, an arbor rotatably supported by the slide, a plate swiveled on said arbor, a scale on the swivel plate, an index on the slide and coiiperating with said scale, an index ring attached to the arbor, and means for connecting the index ring with the swivel plate so that the movement of the swivel plate will be communicated to' the arbor.

8. A stock holder having a base, a slide movable back and forth on the base, an arbor rotatably supported by the slide, a plate swiveled on said arbor, a ring with index notches removably attached to the arbor, and means carried by the swivel plate for engaging the notches of the index ring,

9. A stock holder having a base, a slide movable back and'forth on the base, an arbor rotatably supported by the slide, a plate swiveled on said arbor, a rin .Wlth index notches removably attached to t e arbor, and a lever pivoted to the swivel plate and having a part adapted to engage the notches of the index ring.

' 10. A stock holder having a base, a'slide movable back and forth on the base, an arbor rotatably supported by the slide, a plate swiveled on said arbor, a ring with index notches removably attached to the arbor, a

.gagement with said stops in or lever pivoted to the swiyel plate and having a art adapted to engage t e notches of the in ex ring, a spring or causin the engagement of said lever with the in ex ring, and a handle for facilitating the disengagement of the lever and the index ring.

11. A stock holder having a base, a slide movable back and forth on the base, an arbor rotatably supported by the slide, a plate swiveled on said arbor, an index ring attachedtothe arbor, means for connecting the index ring with the swivel plate, and stops for limiting the swing of the swivel plate.

12. A stock holder having a base, a slide movable back and forth on the base, an arbor rotatably supported by the slide, a plate swiveled on said arbor, an index ring attached to the arbor, means for connecting the index ring with the swivel plate, stops adjustably attached to the base, and a handle projecting from the swivel Slate for ener to determine the movement of the swivel plate.

13. A stock holder having a base, a slide movable back and forth on the base, an arbor rotatably supported by the slide, a plate swiveled on.said arbor, an index 'ring attached to the arbor, means for connecting the index ring with the swivel plate, and a receptacle carried by the arbor for receiving the chips resulting from the work.

14. A stock holder having a base, a slide movable back and forth on the base, adjustable stops for determinin the movement of the'slide, means for clamping the slide, an

arbor rotatably supported by the slide, a plate swiveled on said arbor, means for clamping the swivel plate to the slide, an index ring removably attached to said arbor, means for connecting the index ring with the swivel plate, and sto s for limiting the movement 0 the swivel p ate.

15. A stock holder having a slide, adjustable stops for determining the movement of the slide, means for clamping the slide, an arbor rotatably supported by the slide, a plate swiveled on said arbor, means for clamping the swivel plate to the slide, an index rin removably attached to said arbor, means l 'or connecting the index ring with the swivel plate, and stops for limiting the movement of the swivel late. i

WILLIAM G. ADAMS.

Witnesses:

J osarmma M. STREMPCF'ER, HARRY R. WIILIAMS- 

